diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 5bd8d281..613b31e9 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         ruby-version: ['3.0', '3.1', '3.2']
-        activesupport-version: ['5', '6']
+        activesupport-version: ['6', '7']
         sinatra-version: ['2', '3']
     env:
       ACTIVESUPPORT_MAJOR: ${{ matrix.activesupport-version }}
diff --git a/Gemfile b/Gemfile
index e57e3f90..dd3cc015 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source "https://rubygems.org"
 
 gemspec
-gem "activesupport", "~> #{ENV["ACTIVESUPPORT_MAJOR"] || 6}.x"
+gem "activesupport", "~> #{ENV["ACTIVESUPPORT_MAJOR"] || 7}.x"
 gem "sinatra", "~> #{ENV["SINATRA_MAJOR"] || 2}.x"
diff --git a/pliny.gemspec b/pliny.gemspec
index 4c33b2a0..e764a94f 100644
--- a/pliny.gemspec
+++ b/pliny.gemspec
@@ -15,7 +15,7 @@ Gem::Specification.new do |gem|
   gem.executables = %x{ git ls-files }.split("\n").select { |d| d =~ /^bin\// }.map { |d| d.gsub(/^bin\//, "") }
   gem.files = %x{ git ls-files }.split("\n").select { |d| d =~ %r{^(License|README|bin/|data/|ext/|lib/|spec/|test/)} }
 
-  gem.add_dependency "activesupport",  ">= 5.0.1", "< 7.0"
+  gem.add_dependency "activesupport",  ">= 6.0", "< 8.0"
   gem.add_dependency "multi_json",     "~> 1.9",  ">= 1.9.3"
   gem.add_dependency "prmd",           "~> 0.11", ">= 0.11.4"
 
diff --git a/spec/helpers/zulu_time_spec.rb b/spec/helpers/zulu_time_spec.rb
index cb2423af..d4ca9a01 100644
--- a/spec/helpers/zulu_time_spec.rb
+++ b/spec/helpers/zulu_time_spec.rb
@@ -1,5 +1,4 @@
 require "spec_helper"
-require "active_support/core_ext/numeric/time"
 
 describe Pliny::Helpers::ZuluTime do
   context "zulu_time" do
diff --git a/spec/integration_spec.rb b/spec/integration_spec.rb
index 305f7d04..f1997676 100644
--- a/spec/integration_spec.rb
+++ b/spec/integration_spec.rb
@@ -1,6 +1,5 @@
 require "spec_helper"
 require "open3"
-require 'active_support/core_ext/object/blank'
 
 describe "Pliny integration test" do
   describe "bin/setup" do
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 1ba5e46d..ec51dfed 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -7,6 +7,7 @@
 require "bundler"
 Bundler.require
 
+require "active_support/all"
 require "fileutils"
 require "rack/test"
 require "sequel"